Brown chicken.,Add onion, mushrooms, tomato sauce and paste. Simmer for 30 minutes.,Prepare noodles separately using a tablespoon of oil in water to prevent sticking.,Drain and spread each noodle.,Ready to layer.,Alternate layer sauce, noodles and cheeses in 13 x 9 1/4-inch casserole.,Repeat.,______,Yields 12 to 14 servings.